CVE-2022-49665: platform/x86: thinkpad_acpi: Fix a memory leak of EFCH MMIO resource

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-26 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: thinkpad_acpi: Fix a memory leak of EFCH MMIO resource Unlike release_mem_region(), a call to release_resource() does not free the resource, so it has to be freed explicitly to avoid a memory leak.

Affected products

Linux kernel: from 5.18.1 before 5.18.10; 5.18, 5.18-rc7, 5.19-rc1, 5.19-rc2, 5.19-rc3, 5.19-rc4 — fixed in 5.18.10

How to fix

Upgrade to a fixed version: Linux kernel 5.18.10. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/3884bf75fa044c73e843d95dd71a424e80ebb095
https://git.kernel.org/stable/c/d2f33f0c3ad7b0d5262d9b986f1353265fad7a08

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